diff --git a/static/js/pandora/Query.js b/static/js/pandora/Query.js
index 5db5d9c4..1751ff3e 100644
--- a/static/js/pandora/Query.js
+++ b/static/js/pandora/Query.js
@@ -1,4 +1,9 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+
+'use strict';
+
+// FIXME: remove this
+
 pandora.Query = (function() {
 
     function constructFind(query) {
diff --git a/static/js/pandora/UI.js b/static/js/pandora/UI.js
index ad9e4ec4..e764425b 100644
--- a/static/js/pandora/UI.js
+++ b/static/js/pandora/UI.js
@@ -1,4 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+
+'use strict';
+
 pandora.UI = (function() {
 
     var self = {}, that = {};
diff --git a/static/js/pandora/URL.js b/static/js/pandora/URL.js
index 65fad107..6f2ed3e2 100644
--- a/static/js/pandora/URL.js
+++ b/static/js/pandora/URL.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.URL = (function() {
 
     var self = {}, that = {};
diff --git a/static/js/pandora/account.js b/static/js/pandora/account.js
index bf442cfc..23234cd9 100644
--- a/static/js/pandora/account.js
+++ b/static/js/pandora/account.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.accountDialog = function(action) {
     var that = Ox.Dialog(Ox.extend({
             fixedSize: true,
diff --git a/static/js/pandora/appPanel.js b/static/js/pandora/appPanel.js
index 6b55a46d..17c7e433 100644
--- a/static/js/pandora/appPanel.js
+++ b/static/js/pandora/appPanel.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.appPanel = function() {
     var that = Ox.SplitPanel({
             elements: [
diff --git a/static/js/pandora/autovalidate.js b/static/js/pandora/autovalidate.js
index d848dfe3..38a11bad 100644
--- a/static/js/pandora/autovalidate.js
+++ b/static/js/pandora/autovalidate.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.autovalidateCode = function(value, blur, callback) {
     value = value.toUpperCase().split('').map(function(v) {
         return /[A-Z]/.test(v) ? v : null;
diff --git a/static/js/pandora/backButton.js b/static/js/pandora/backButton.js
index d21b7cfa..91a72b00 100644
--- a/static/js/pandora/backButton.js
+++ b/static/js/pandora/backButton.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.backButton = function() {
     var that = Ox.Button({
         title: 'Back to ' + pandora.site.itemName.plural,
diff --git a/static/js/pandora/browser.js b/static/js/pandora/browser.js
index dd284d2b..37c38f09 100644
--- a/static/js/pandora/browser.js
+++ b/static/js/pandora/browser.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.browser = function() {
     var that;
     if (!pandora.user.ui.item) {
diff --git a/static/js/pandora/clipList.js b/static/js/pandora/clipList.js
index 0dba9b17..de563dd3 100644
--- a/static/js/pandora/clipList.js
+++ b/static/js/pandora/clipList.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.clipList = function(videoRatio) {
 
     var ui = pandora.user.ui,
diff --git a/static/js/pandora/clipPlayer.js b/static/js/pandora/clipPlayer.js
index 7de17cae..8fd209a3 100644
--- a/static/js/pandora/clipPlayer.js
+++ b/static/js/pandora/clipPlayer.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.clipPlayer = function() {
     // FIXME: is clipPlayer the best name for this?
     var that = Ox.VideoPlayer({
diff --git a/static/js/pandora/clipsView.js b/static/js/pandora/clipsView.js
index 7fe75c10..667828f0 100644
--- a/static/js/pandora/clipsView.js
+++ b/static/js/pandora/clipsView.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.clipsView = function(videoRatio) {
 
     var that = Ox.SplitPanel({
diff --git a/static/js/pandora/contactForm.js b/static/js/pandora/contactForm.js
index 029ec267..dae1b6fe 100644
--- a/static/js/pandora/contactForm.js
+++ b/static/js/pandora/contactForm.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.contactForm = function() {
 
     var that = Ox.Element(),
diff --git a/static/js/pandora/contentPanel.js b/static/js/pandora/contentPanel.js
index 66942ed5..56a8f7bc 100644
--- a/static/js/pandora/contentPanel.js
+++ b/static/js/pandora/contentPanel.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.contentPanel = function() {
     var that = Ox.SplitPanel({
             elements: !pandora.user.ui.item ? [
diff --git a/static/js/pandora/deleteListDialog.js b/static/js/pandora/deleteListDialog.js
index b6e5a125..a92d19e7 100644
--- a/static/js/pandora/deleteListDialog.js
+++ b/static/js/pandora/deleteListDialog.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.deleteListDialog = function() {
 
     var listData = pandora.getListData(),
diff --git a/static/js/pandora/editor.js b/static/js/pandora/editor.js
index 7db0515a..5cb981fb 100644
--- a/static/js/pandora/editor.js
+++ b/static/js/pandora/editor.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 // fixme: this should be deleted!!
 
 pandora.ui.annotations = function() {
diff --git a/static/js/pandora/eventsDialog.js b/static/js/pandora/eventsDialog.js
index 139a96f1..bf4a6ebb 100644
--- a/static/js/pandora/eventsDialog.js
+++ b/static/js/pandora/eventsDialog.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.eventsDialog = function() {
     var height = Math.round((window.innerHeight - 48) * 0.9),
         width = Math.round(window.innerWidth * 0.9),
diff --git a/static/js/pandora/filesView.js b/static/js/pandora/filesView.js
index 3e0c8d42..2def4ca6 100644
--- a/static/js/pandora/filesView.js
+++ b/static/js/pandora/filesView.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.filesView = function(options, self) {
 
     var self = self || {},
diff --git a/static/js/pandora/filter.js b/static/js/pandora/filter.js
index e4c6e57c..d49751fa 100644
--- a/static/js/pandora/filter.js
+++ b/static/js/pandora/filter.js
@@ -1,4 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+
+'use strict';
+
 pandora.ui.filter = function(list) {
     var that = Ox.Filter({
             findKeys: Ox.merge(Ox.map(pandora.site.itemKeys, function(key) {
diff --git a/static/js/pandora/filterDialog.js b/static/js/pandora/filterDialog.js
index 7386c901..7d9e6a75 100644
--- a/static/js/pandora/filterDialog.js
+++ b/static/js/pandora/filterDialog.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.filterDialog = function(list) {
     var that = Ox.Dialog({
         buttons: [
diff --git a/static/js/pandora/findElement.js b/static/js/pandora/findElement.js
index 8a6c8f4c..ec58b97c 100644
--- a/static/js/pandora/findElement.js
+++ b/static/js/pandora/findElement.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.findElement = function() {
     var findIndex = pandora.user.ui._findState.index,
         findKey = pandora.user.ui._findState.key,
diff --git a/static/js/pandora/folderBrowser.js b/static/js/pandora/folderBrowser.js
index 6cef76e1..4275ab4e 100644
--- a/static/js/pandora/folderBrowser.js
+++ b/static/js/pandora/folderBrowser.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.folderBrowser = function(id) {
     var that = Ox.SplitPanel({
         elements: [
diff --git a/static/js/pandora/folderBrowserBar.js b/static/js/pandora/folderBrowserBar.js
index 6cbf08c7..7b5e8c3c 100644
--- a/static/js/pandora/folderBrowserBar.js
+++ b/static/js/pandora/folderBrowserBar.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.folderBrowserBar = function(id) {
     var that = Ox.Bar({
             size: 24
diff --git a/static/js/pandora/folderBrowserList.js b/static/js/pandora/folderBrowserList.js
index 98e84b4f..2354e2f1 100644
--- a/static/js/pandora/folderBrowserList.js
+++ b/static/js/pandora/folderBrowserList.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.folderBrowserList = function(id) {
     // fixme: user and name are set to the same width here,
     // but resizeFolders will set them to different widths
diff --git a/static/js/pandora/folderList.js b/static/js/pandora/folderList.js
index 7666afcd..ab134aa5 100644
--- a/static/js/pandora/folderList.js
+++ b/static/js/pandora/folderList.js
@@ -1,5 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
-
+'use strict';
 pandora.ui.folderList = function(id) {
     var i = Ox.getPositionById(pandora.site.sectionFolders[pandora.user.ui.section], id),
         that;
diff --git a/static/js/pandora/folders.js b/static/js/pandora/folders.js
index 5ae15973..89ca123b 100644
--- a/static/js/pandora/folders.js
+++ b/static/js/pandora/folders.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.folders = function() {
     var ui = pandora.user.ui,
         that = Ox.Element()
diff --git a/static/js/pandora/group.js b/static/js/pandora/group.js
index b4a47c64..f3677260 100644
--- a/static/js/pandora/group.js
+++ b/static/js/pandora/group.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.group = function(id) {
     var i = Ox.getPositionById(pandora.user.ui.groups, id),
         group = Ox.getObjectById(pandora.site.groups, id),
diff --git a/static/js/pandora/helpDialog.js b/static/js/pandora/helpDialog.js
index 2864e080..07c80299 100644
--- a/static/js/pandora/helpDialog.js
+++ b/static/js/pandora/helpDialog.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.helpDialog = function() {
     var content = Ox.Element().css({margin: '16px'}),
         that = Ox.Dialog({
diff --git a/static/js/pandora/home.js b/static/js/pandora/home.js
index f5d9a86c..b8285aa1 100644
--- a/static/js/pandora/home.js
+++ b/static/js/pandora/home.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.home = function() {
 
     var that = $('<div>')
diff --git a/static/js/pandora/homePage.js b/static/js/pandora/homePage.js
index 5d17fc7e..587fd234 100644
--- a/static/js/pandora/homePage.js
+++ b/static/js/pandora/homePage.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 // fixme: remove
 
 pandora.ui.homePage = function() {
diff --git a/static/js/pandora/info.js b/static/js/pandora/info.js
index ce9fbd1f..33e9eaba 100644
--- a/static/js/pandora/info.js
+++ b/static/js/pandora/info.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.info = function() {
 
     var ui = pandora.user.ui,
diff --git a/static/js/pandora/infoView.js b/static/js/pandora/infoView.js
index dea4d865..a4ca0237 100644
--- a/static/js/pandora/infoView.js
+++ b/static/js/pandora/infoView.js
@@ -1,3 +1,5 @@
+'use strict';
+
 pandora.ui.infoView = function(data) {
 
     // fixme: given that currently, the info view doesn't scroll into view nicely
diff --git a/static/js/pandora/itemClips.js b/static/js/pandora/itemClips.js
index d394e806..2c9cbd15 100644
--- a/static/js/pandora/itemClips.js
+++ b/static/js/pandora/itemClips.js
@@ -1,3 +1,5 @@
+'use strict';
+
 pandora.ui.itemClips = function(options) {
 
     var self = {},
diff --git a/static/js/pandora/leftPanel.js b/static/js/pandora/leftPanel.js
index 1a8a4036..850f0b5b 100644
--- a/static/js/pandora/leftPanel.js
+++ b/static/js/pandora/leftPanel.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.leftPanel = function() {
     var that = Ox.SplitPanel({
             elements: [
diff --git a/static/js/pandora/listDialog.js b/static/js/pandora/listDialog.js
index f704b5d4..09f4a5e2 100644
--- a/static/js/pandora/listDialog.js
+++ b/static/js/pandora/listDialog.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.listDialog = function(section) {
 
     section = section || 'general';
diff --git a/static/js/pandora/logsDialog.js b/static/js/pandora/logsDialog.js
index a510164e..7ac9c5f0 100644
--- a/static/js/pandora/logsDialog.js
+++ b/static/js/pandora/logsDialog.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.logsDialog = function() {
     var height = Math.round((window.innerHeight - 48) * 0.9),
         width = Math.round(window.innerWidth * 0.9),
diff --git a/static/js/pandora/mainPanel.js b/static/js/pandora/mainPanel.js
index 09b898fa..0a415b6b 100644
--- a/static/js/pandora/mainPanel.js
+++ b/static/js/pandora/mainPanel.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.mainPanel = function() {
     var that = Ox.SplitPanel({
             elements: [
diff --git a/static/js/pandora/mediaView.js b/static/js/pandora/mediaView.js
index d4fcdd47..ff875c33 100644
--- a/static/js/pandora/mediaView.js
+++ b/static/js/pandora/mediaView.js
@@ -1,3 +1,5 @@
+'use strict';
+
 pandora.ui.mediaView = function() {
 
     var item = pandora.user.ui.item,
diff --git a/static/js/pandora/menu.js b/static/js/pandora/menu.js
index e3ba66d9..22c65302 100644
--- a/static/js/pandora/menu.js
+++ b/static/js/pandora/menu.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.mainMenu = function() {
 
     var isAdmin = pandora.user.level == 'admin',
diff --git a/static/js/pandora/namesDialog.js b/static/js/pandora/namesDialog.js
index 89059320..472c8515 100644
--- a/static/js/pandora/namesDialog.js
+++ b/static/js/pandora/namesDialog.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.namesDialog = function() {
 
     // FIXME: add cache invalidation
diff --git a/static/js/pandora/navigationView.js b/static/js/pandora/navigationView.js
index db924d68..ef3a93e5 100644
--- a/static/js/pandora/navigationView.js
+++ b/static/js/pandora/navigationView.js
@@ -1,5 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
-
+'use strict';
 pandora.ui.navigationView = function(type, videoRatio) {
 
     var ui = pandora.user.ui,
diff --git a/static/js/pandora/orderButton.js b/static/js/pandora/orderButton.js
index e4f14c0e..5812afb8 100644
--- a/static/js/pandora/orderButton.js
+++ b/static/js/pandora/orderButton.js
@@ -1,5 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
-
+'use strict';
 pandora.ui.orderButton = function(isNavigationView) {
     var sortKey = !pandora.user.ui.item ? 'listSort' : 'itemSort',
         that = Ox.Button({
diff --git a/static/js/pandora/placesDialog.js b/static/js/pandora/placesDialog.js
index 60abf577..fa40663b 100644
--- a/static/js/pandora/placesDialog.js
+++ b/static/js/pandora/placesDialog.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.placesDialog = function() {
     var height = Math.round((window.innerHeight - 48) * 0.9),
         width = Math.round(window.innerWidth * 0.9),
diff --git a/static/js/pandora/preferencesDialog.js b/static/js/pandora/preferencesDialog.js
index 19f277bb..d7d78439 100644
--- a/static/js/pandora/preferencesDialog.js
+++ b/static/js/pandora/preferencesDialog.js
@@ -1,3 +1,5 @@
+'use strict';
+
 pandora.ui.preferencesDialog = function() {
 
     var tabs = [
diff --git a/static/js/pandora/publicLists.js b/static/js/pandora/publicLists.js
index 58b6752d..8ffd75ed 100644
--- a/static/js/pandora/publicLists.js
+++ b/static/js/pandora/publicLists.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.publicListsDialog = function() { // fixme: unused
     var that = Ox.Dialog({
         buttons: [
diff --git a/static/js/pandora/rightPanel.js b/static/js/pandora/rightPanel.js
index 9d3d2a2a..8c59ecc6 100644
--- a/static/js/pandora/rightPanel.js
+++ b/static/js/pandora/rightPanel.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.rightPanel = function() {
     var that;
     if (pandora.user.ui.section == 'items') {
diff --git a/static/js/pandora/sectionButtons.js b/static/js/pandora/sectionButtons.js
index dd1b0a9d..f97c2df6 100644
--- a/static/js/pandora/sectionButtons.js
+++ b/static/js/pandora/sectionButtons.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.sectionButtons = function() {
     var that = Ox.ButtonGroup({
             buttons: [
diff --git a/static/js/pandora/sectionSelect.js b/static/js/pandora/sectionSelect.js
index ee1fe3cb..7ab0d060 100644
--- a/static/js/pandora/sectionSelect.js
+++ b/static/js/pandora/sectionSelect.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.sectionSelect = function() {
     // fixme: duplicated
     var that = Ox.Select({
diff --git a/static/js/pandora/sectionbar.js b/static/js/pandora/sectionbar.js
index 0a6f15d5..2b072863 100644
--- a/static/js/pandora/sectionbar.js
+++ b/static/js/pandora/sectionbar.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.sectionbar = function(mode) {
     var that = Ox.Bar({
             size: 24
diff --git a/static/js/pandora/siteDialog.js b/static/js/pandora/siteDialog.js
index 36945648..738d82b5 100644
--- a/static/js/pandora/siteDialog.js
+++ b/static/js/pandora/siteDialog.js
@@ -1,4 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+
+'use strict';
+
 pandora.ui.siteDialog = function(section) {
 
     var tabs = Ox.merge(
diff --git a/static/js/pandora/sortMenu.js b/static/js/pandora/sortMenu.js
index a376c4d9..70becfef 100644
--- a/static/js/pandora/sortMenu.js
+++ b/static/js/pandora/sortMenu.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.sortMenu = function() {
 
     // fixme: unused
diff --git a/static/js/pandora/sortSelect.js b/static/js/pandora/sortSelect.js
index b499f03b..36a31066 100644
--- a/static/js/pandora/sortSelect.js
+++ b/static/js/pandora/sortSelect.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.sortSelect = function(isNavigationView) {
     var isClipView = pandora.isClipView(),
         items = [],
diff --git a/static/js/pandora/status.js b/static/js/pandora/status.js
index ad856f61..510e5990 100644
--- a/static/js/pandora/status.js
+++ b/static/js/pandora/status.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.status = function(key, data) {
     var itemName = data.items != 1 ? pandora.site.itemName.plural : pandora.site.itemName.singular,
         segments = [],
diff --git a/static/js/pandora/statusbar.js b/static/js/pandora/statusbar.js
index 1d488ca2..c0ab5089 100644
--- a/static/js/pandora/statusbar.js
+++ b/static/js/pandora/statusbar.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.statusbar = function() {
     var that = Ox.Bar({
             size: 16
diff --git a/static/js/pandora/titlesDialog.js b/static/js/pandora/titlesDialog.js
index 5cc54741..14c2c3ee 100644
--- a/static/js/pandora/titlesDialog.js
+++ b/static/js/pandora/titlesDialog.js
@@ -1,4 +1,5 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+'use strict';
 pandora.ui.titlesDialog = function() {
 
     var height = Math.round((window.innerHeight - 48) * 0.9),
diff --git a/static/js/pandora/toolbar.js b/static/js/pandora/toolbar.js
index af514257..6d3bf669 100644
--- a/static/js/pandora/toolbar.js
+++ b/static/js/pandora/toolbar.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.toolbar = function() {
     var ui = pandora.user.ui,
         isNavigationView = !ui.item
diff --git a/static/js/pandora/usersDialog.js b/static/js/pandora/usersDialog.js
index 508fb00f..49feecaf 100644
--- a/static/js/pandora/usersDialog.js
+++ b/static/js/pandora/usersDialog.js
@@ -1,4 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
+
+'use strict';
+
 pandora.ui.usersDialog = function() {
 
     var height = Math.round((window.innerHeight - 48) * 0.9),
diff --git a/static/js/pandora/utils.js b/static/js/pandora/utils.js
index 7946ad36..b1768de2 100644
--- a/static/js/pandora/utils.js
+++ b/static/js/pandora/utils.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.addList = function() {
     // addList(isSmart, isFrom) or addList(list) [=duplicate]
     var $folderList = pandora.$ui.folderList.personal,
diff --git a/static/js/pandora/videoPreview.js b/static/js/pandora/videoPreview.js
index 7f172a4c..cadf3ba4 100644
--- a/static/js/pandora/videoPreview.js
+++ b/static/js/pandora/videoPreview.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.videoPreview = function(data) {
     var that = Ox.VideoPreview({
             duration: data.duration,
diff --git a/static/js/pandora/viewSelect.js b/static/js/pandora/viewSelect.js
index b73639b8..fb9f76ad 100644
--- a/static/js/pandora/viewSelect.js
+++ b/static/js/pandora/viewSelect.js
@@ -1,5 +1,7 @@
 // vim: et:ts=4:sw=4:sts=4:ft=javascript
 
+'use strict';
+
 pandora.ui.viewSelect = function() {
     var ui = pandora.user.ui,
         sortKey = !ui.item ? 'listSort' : 'itemSort',